#include<bits/stdc++.h> using namespace std;

int n,ans;

int main(){

string s;
string vk="VK",vv="VV",kk="KK";


cin>>n;
cin>>s;

int second=s.find(vk);

while(second!=-1){
	ans++;
	second=s.find(vk,second+1);
	s.substr(second,2);
}
if(s.find(vv)!=-1) ans++;
else (s.find(kk)!=-1) ans++;
if(s.find(vv)!=-1&&s.find(kk)!=-1) ans--;
cout<<ans;

return 0;

}